<domain type="kvm">
  <name>foo</name>
  <memory unit="KiB">1234</memory>
  <vcpu>3</vcpu>
  <features>
    <foo/>
    <bar/>
    <baz/>
  </features>
  <on_poweroff>restart</on_poweroff>
  <metadata>
    <libosinfo:libosinfo xmlns:libosinfo="http://libosinfo.org/xmlns/libvirt/domain/1.0">
      <libosinfo:os id="http://centos.org/centos/7"/>
    </libosinfo:libosinfo>
    <nova:instance xmlns:nova="http://openstack.org/nova/instance/1">
      <nova:flavor name="m1.small">
        <nova:memory>512</nova:memory>
        <nova:disk>10</nova:disk>
      </nova:flavor>
    </nova:instance>
    <boxes:gnome-boxes xmlns:boxes="https://wiki.gnome.org/Apps/Boxes">
      <os-state>installed</os-state>
    </boxes:gnome-boxes>
    <ns:foo xmlns:ns="http://bar"/>
    <ns:bar xmlns:ns="http://foo"/>
  </metadata>
</domain>